Fix body field mismatch when switching between items in edit dialog

The RichTextEditor was not updating its content when switching from one
item to another because initializedRef was only reset when value became
null. Now uses prevValueRef to properly detect value changes.

web/storage.jsx

@@ -79,12 +79,13 @@ const Parser = {
       // Check for body line (starts with whitespace + "> ")
       const bodyMatch = line.match(/^(\s*)>\s?(.*)$/);
       if (bodyMatch) {
-        // Body line - attach to current item at matching depth
-        const bodyDepth = bodyMatch[1].length / 2;
+        // Body line - attach to the most recent item in the stack
+        // Body indent is one level deeper than its parent item (e.g., item at depth 0 has body at depth 1)
+        const bodyIndent = bodyMatch[1].length / 2;
         const bodyLine = bodyMatch[2];
-        // Find the item at this depth
+        // Find the item whose depth is bodyIndent - 1 (body is indented under its item)
         for (let j = stack.length - 1; j >= 0; j--) {
-          if (stack[j].depth === bodyDepth && stack[j].item) {
+          if (stack[j].item && stack[j].depth === bodyIndent - 1) {
             if (!stack[j].item.body) stack[j].item.body = '';
             else stack[j].item.body += '\n';
             stack[j].item.body += bodyLine;
@@ -165,10 +166,11 @@ const Parser = {
       const metaStr = meta.length ? ` *(${meta.join(', ')})*` : '';
       const prefix  = it.priority ? `[${it.priority}] ` : '';
       lines.push(`${indent}- [${GLYPH[it.status] || ' '}] ${prefix}${it.title}${metaStr}`);
-      // Serialize body as indented blockquote lines
+      // Serialize body as indented blockquote lines (one level deeper than item)
       if (it.body) {
+        const bodyIndent = '  '.repeat(depth + 1);
         for (const bodyLine of it.body.split('\n')) {
-          lines.push(`${indent}> ${bodyLine}`);
+          lines.push(`${bodyIndent}> ${bodyLine}`);
         }
       }
       if (it.children?.length) {